Grain separator for thrashing machines



2 sheets sheet 1.

(No Model.)

P. L. NASH.

GR AIN SEPABATOR FOR THRA SHING MAGHINES. No. 295,668.

Pgieented Mar. 25, 1 84.

N. PETERS, Fhnln-Ulllognphon Walhillglnn, no. I

(No M66161. 2 Sheets-Sheet 2.

. PfL. NASH.

v GRAIN SEPARATOR FOR THRASHING MAGHINE S. No. 295,668. Patented'Mar. 25, 1884.

N. PETERS. Pholw-L'rlhognphen W'zshin mv; n. c.

'Uiviran STATES PATENT Garden.

1 PONTALBA L. NASH, OF HOLLISTER, CALIFORNIA.

GRAlN-SEPARATOR FOR I'HRASHING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 295,668, dated March 25, 1384.

Application filed December 7,1883. (N model.)

To all whom, it may concern.-

Be it known that I, PONTALBA L. NASH, of Hollister, county of San Benito, and State of California, have inventedan Improvement in Grai n-Separators for Th rash in g-Machines; an d I hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to certain improvements in thrashing-machines; and it consists in certain details ofcoustruction, which will be hereinafter more fully explained, and specified in the claims, reference being had to the accompanying drawings, in which- Figure 1 is a longitudinal vertical section of my apparatus. Fig. 2 is atransverse vertical section of the grain-table. Fig. 3 is a transverse vertical section of the apparatus through a is the frame-work of a thrashing-machine, the upper part of which may be made somewhat higher than usual to accommodate the additional parts.

A is the thrashing-cylinder, to which the unthrashed straw may be fed in any suitable or well-known manner. fAbOVG and behind the cylinder the top of, the machine forms an arch, as shown at b, so thiatthestra-w may follow the curve after it leaves the cylinder and pass back to the rear of'the machine, while whatever grain is separated in the cylinder will fall through the straw-carrier B upon the inclined table (3, by which it isbrought back toward the front of the machine. This table is made higher in the center than at the edges, like a roof, and the grain is thus caused to flow off into the troughs formed upon each side by the turned-up edges (3,, as shown in Fig. 2.

The sides of the machine (I come down inside these flanges G, and thus prevent the chaff from being blown out at the sides. As this table has an incline downward toward the front, it will be seen that grain will flow down into the troughs at each edge, and the vibrating motion given the table by the rocker-arms D causes it to move down to the point of discharge just in front of the fan E and upon a carrier-belt, F, by which it is delivered upon a table and riddle, G G. The. table G and riddle G are continuous, and ,the sieve N is fixed to the riddle just beneathit, the whole The arm I) has its center moving together.

m, as shown. The force with which the grain and straw are thrown back from the cylinder causes the former to follow the arched top back nearly to the rear end, where it falls upon the table, as before described; but in this instance I fix a sheet of metal about twelve inches wide above and behind the cylinder, and by bending this the grain may be given any desired direction as it leaves the cylinder. The straw falls upon the carrier B, by which it is returned so as to pass down in front of the center of the fan E, the blast from which turns it again toward the rear, and it falls second straw-carrier, K, which carries it toward the rear end of the machine again.

' d. is a curved shield, which serves the'double purpose of deflecting, with its convex surface, the grain and straw from the cylinder into the upper part of the machine, as before described, and its concave surface directs the grain and straw which are returning toward the front downward and backward again.

f f are inclined strips placed within or near this concave shield, and they serve to keep the straw in the center and deliver it in this man ner upon the carrier K below.

I is a fan situated at the upper rear end of the machine, and a curved air duct or passage, J, extends from it above the arched top of the machine. The bottom of this duct is open or perforated with holes at i, which allow the air-blast to pass through and into the space beneath the arch, so as to force the straw downward upon the returu-carrier B, and also to partially separate the grain from it. Any grain which may be separated from the straw while passing over the carrier K will fall through upon the belt F below, to be carried with the larger quantity to the table G, before mentioned. This table is in the same plane with riddle or screen G, and the grain and chaff which fall upon it are carried forward by the end-shaking motion which it receives from the crank or eccentric g, the screen, where the work of separation begins. The straw falls from the second strawcarrier, K, upon the carrier L, by which it is discharged at the rear of the machine.

upon theand pass upon M is another l'an opening toward the rear, so that all straw which falls from K to L will be subjected to a blast of air from it, and a furth er separation of any grain in it will take place. From the perforated riddle G the grain falls through upon the sieve N, where itis subjected to a blast of air from the fan 0. The grain falls through upon the incline 1 and slides down to the auger Q, by which it is taken to the side of the machine to be sacked. The blast from the fan blows the chaff out at the rear of the machine. The heavier barley and unthrashed heads of wheat will be stopped by a board, It,

and will fallinto the auger S, by which it is carried to one side and to the return-elevator.

T is a vertical board or stop at the rear of the sieve-frame, and by this any bolt, nut, or tooth which may become loosened will be stopped when it reaches this point and prevented i'rom falling into the auger S, to be returned by the elevator and again pass through the cylinder.

At the outer end of the auger Q is an extension or supplemental auger, U, which may be connected with the shaft of the auger Q, by a universal joint, V, so that the secondary auger will be driven from it. The universal joint allows the end of this auger to be raised to any desired height, and it will thus elevate the grain to a point high enough to be sacked, which is done by the double chute and directioirgate shown in Fig.4. The various carrier-belts, fans, and other devices are driven by belts in a manner similar to that usually adopted in this class of machines. The upper grain-table and the screen-frame are caused-to vibrate endwise by means of the rocker-arm D and a crank or eccentric connection, as at W. Any grain which falls directly from the thrashingcylinder is received upon a belt, 9, and is carricd up by it beneath the shield (Z and delivcred behind the fan E and falls upon the belt F.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In athrashing-machine, the thrashing-cylinder, in combination with a directing-shield, cl, the arched top I), the blast-fan, and duct J, substantially as herein described.

2. In a thlashing-machine, the combination, with the thrashing-cylinder, of the arched top, forming a space through which the grain and straw may be projected from the cylinder, the superposed air-duct, the blast-fan, the inclined angular grain-table, and the return-carrierJB, substantially as herein described.

3. The inclined angular grain-table, the sus pending-links and end-shaking mechanism, and the return strawcarrier traveling above the table, in combination with the curved shield d, inclined directingrstrips, and the fan E, sub

stantially as herein described.

4:. The inclined angular shaking-table, the return straw-earrier,directing-shield and strips, and the fan E, in combination with the strawcarrier K and grain-belt F, substantially as herein described.

5.. The combination of the inclined angular slmking-tablc,tl1o return straw-carrier, directing-shield, carriers K and L, fans E and M, grain-belt F, and the screens, substantiallyas herein described.

In witness whereof I have hereunto set my hand.

PONTALBA L. NASH.

Witnesses:

S. H. Nounsn, H. 0. LEE. 

